CVE-2026-64174 Linux CVE debrief

Who should care

Linux kernel maintainers, Linux distribution vendors, and users of Linux-based systems should be aware of this vulnerability. They should review system configurations, apply patches as recommended by vendors, and monitor Linux kernel updates for further patches.

Technical summary

The cfg80211_merge_profile() function reassembles a Multi-BSSID non-transmitted BSS profile. However, it did not advance loop variables mbssid_elem and sub_elem, causing it to search for the same continuation repeatedly. This could lead to excessive time spent in cfg80211_merge_profile() when processing a specially-crafted malicious beacon. The vulnerability affects Linux kernel versions and can be exploited by a malicious beacon.

Defensive priority

Medium

Recommended defensive actions

• Review and apply the provided kernel patches
• Monitor Linux kernel updates for further patches
• Consider implementing compensating controls for Linux-based systems
• Verify system configurations and apply patches as recommended by vendors
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

Evidence is limited to the provided CVE and NVD information. Further analysis is needed to fully understand the vulnerability's impact. Linux kernel maintainers and Linux distribution vendors should verify the affected scope and severity. Users of Linux-based systems should review system configurations and apply patches as recommended by vendors. The vulnerability's impact on Linux kernel versions and distributions needs verification.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.